don't nat map where its loopback

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13589 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/event_handlers/mod_event_socket/mod_event_socket.c

@@ -2244,6 +2244,10 @@ static int config(void)
 		prefs.nat_map = 0;
 	}
 
+	if (prefs.nat_map && !switch_check_network_list_ip(prefs.ip, "loopback.auto")) {
+		prefs.nat_map = 0;
+	}
+
 	if (!prefs.port) {
 		prefs.port = 8021;
 	}